Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6437315 | Radiation-based contactless position reference system and method for elevators | — | 2002-08-20 |
| 6253879 | Apparatus and method of determining overspeed of an elevator car | Alberto Vecchiotti | 2001-07-03 |
| 6161653 | Ropeless governor mechanism for an elevator car | Richard W. Calcasola, Samuel C. Wan | 2000-12-19 |
| 6137255 | Apparatus and method of controlling a linear motor door operator | — | 2000-10-24 |
| 5955709 | Elevator control system featuring all-electromagnet vibration and centering elevator car controller for coupling a roller arranged on a pivot arm to a guide rail | Boris G. Traktovenko | 1999-09-21 |
| 5816369 | Method of mounting an elevator roller guide on a guide rail | — | 1998-10-06 |
| 5749444 | Contactless slide guide for elevators | — | 1998-05-12 |
| 5652414 | Elevator active guidance system having a coordinated controller | Randall Keith Roberts, Timothy M. Remmers | 1997-07-29 |
| 5617023 | Industrial contactless position sensor | — | 1997-04-01 |
| 5597988 | Control system for elevator active vibration control using spatial filtering | — | 1997-01-28 |
| 5535853 | Actuator having a two ended actuator rod movable longitudinally and transversely | — | 1996-07-16 |
| 5467850 | Permanent magnet, magnetodynamic safety brake for elevators and the like | — | 1995-11-21 |
| 5467243 | Electromagnet control system | — | 1995-11-14 |
| 5439075 | Elevator active suspension system | John K. Salmon, Boris G. Traktovenko, Richard L. Hollowell | 1995-08-08 |
| 5400872 | Counteracting horizontal accelerations on an elevator car | John K. Salmon, Richard L. Hollowell | 1995-03-28 |
| 5373123 | Electromagnetic gaging of elevator rails and other structures | — | 1994-12-13 |
| 5367132 | Centering control for elevator horizontal suspension | Boris G. Traktovenko | 1994-11-22 |
| 5329077 | Elevator ride quality | Randall Keith Roberts | 1994-07-12 |
| 5322144 | Active control of elevator platform | John K. Salmon, Boris G. Traktovenko, Richard L. Hollowell | 1994-06-21 |
| 5321217 | Apparatus and method for controlling an elevator horizontal suspension | Boris G. Traktovenko, Richard L. Hollowell | 1994-06-14 |
| 5308938 | Elevator active suspension system | Randall Keith Roberts, Richard L. Hollowell, John K. Salmon | 1994-05-03 |
| 5304751 | Elevator horizontal suspensions and controls | Boris G. Traktovenko | 1994-04-19 |
| 5294757 | Active vibration control system for an elevator, which reduces horizontal and rotational forces acting on the car | John K. Salmon, Boris G. Traktovenko, Richard L. Hollowell | 1994-03-15 |
| 5274203 | """Smart"" position transducer system for elevators" | Richard C. McCarthy | 1993-12-28 |
| 5117946 | Elevator cab guidance assembly | Boris G. Traktovenko | 1992-06-02 |